/
tid.go
169 lines (145 loc) · 4.23 KB
/
tid.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/*
* Copyright (C) 2016 Red Hat, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy ofthe License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specificlanguage governing permissions and
* limitations under the License.
*
*/
package topology
import (
"github.com/nu7hatch/gouuid"
"github.com/skydive-project/skydive/graffiti/graph"
"github.com/skydive-project/skydive/logging"
)
// TIDMapper describes the hostID nodes stored in a graph
// the mapper will broadcast node event to the registered listeners
type TIDMapper struct {
graph.DefaultGraphListener
Graph *graph.Graph
hostID graph.Identifier
}
// Start the mapper
func (t *TIDMapper) Start() {
t.Graph.AddEventListener(t)
}
// Stop the mapper
func (t *TIDMapper) Stop() {
t.Graph.RemoveEventListener(t)
}
func (t *TIDMapper) setTID(parent, child *graph.Node) {
tp, _ := child.GetFieldString("Type")
if tp == "" {
return
}
var key string
switch tp {
case "ovsbridge", "ovsport":
return
case "netns":
key, _ = child.GetFieldString("Path")
default:
key, _ = child.GetFieldString("Name")
}
if key == "" {
return
}
if tid, _ := parent.GetFieldString("TID"); tid != "" {
tid = tid + key + tp
u, _ := uuid.NewV5(uuid.NamespaceOID, []byte(tid))
t.Graph.AddMetadata(child, "TID", u.String())
}
}
// onNodeEvent set TID
// TID is UUIDV5(ID/UUID) of "root" node like host, netns, ovsport, fabric
// for other nodes TID is UUIDV5(rootTID + Name + Type)
func (t *TIDMapper) onNodeEvent(n *graph.Node) {
if _, err := n.GetFieldString("TID"); err != nil {
if tp, err := n.GetFieldString("Type"); err == nil {
switch tp {
case "host":
if name, err := n.GetFieldString("Name"); err == nil {
u, _ := uuid.NewV5(uuid.NamespaceOID, []byte(name))
t.hostID = graph.Identifier(u.String())
t.Graph.AddMetadata(n, "TID", u.String())
}
case "netns":
if path, _ := n.GetFieldString("Path"); path != "" {
tid := string(t.hostID) + path + tp
u, _ := uuid.NewV5(uuid.NamespaceOID, []byte(tid))
t.Graph.AddMetadata(n, "TID", u.String())
}
case "ovsbridge", "ovsport":
if u, _ := n.GetFieldString("UUID"); u != "" {
tid := string(t.hostID) + u + tp
u, _ := uuid.NewV5(uuid.NamespaceOID, []byte(tid))
t.Graph.AddMetadata(n, "TID", u.String())
}
default:
if probe, _ := n.GetFieldString("Probe"); probe == "fabric" {
t.Graph.AddMetadata(n, "TID", string(n.ID))
} else {
parents := t.Graph.LookupParents(n, nil, OwnershipMetadata())
if len(parents) > 1 {
logging.GetLogger().Errorf("A should always only have one ownership parent: %v", n)
} else if len(parents) == 1 {
t.setTID(parents[0], n)
}
}
}
}
}
}
// OnNodeUpdated event
func (t *TIDMapper) OnNodeUpdated(n *graph.Node) {
t.onNodeEvent(n)
}
// OnNodeAdded evetn
func (t *TIDMapper) OnNodeAdded(n *graph.Node) {
t.onNodeEvent(n)
}
// onEdgeEvent set TID for child TID nodes which is composed of the name
// the TID of the parent node and the type.
func (t *TIDMapper) onEdgeEvent(e *graph.Edge) {
if rl, _ := e.GetFieldString("RelationType"); rl != OwnershipLink {
return
}
parents, children := t.Graph.GetEdgeNodes(e, nil, nil)
if len(parents) == 0 || len(children) == 0 {
return
}
t.setTID(parents[0], children[0])
}
// OnEdgeUpdated event
func (t *TIDMapper) OnEdgeUpdated(e *graph.Edge) {
t.onEdgeEvent(e)
}
// OnEdgeAdded event
func (t *TIDMapper) OnEdgeAdded(e *graph.Edge) {
t.onEdgeEvent(e)
}
// OnEdgeDeleted event
func (t *TIDMapper) OnEdgeDeleted(e *graph.Edge) {
if rl, _ := e.GetFieldString("RelationType"); rl != OwnershipLink {
return
}
parents, children := t.Graph.GetEdgeNodes(e, nil, nil)
if len(parents) == 0 || len(children) == 0 {
return
}
t.Graph.DelMetadata(children[0], "TID")
}
// NewTIDMapper creates a new node mapper in the graph g
func NewTIDMapper(g *graph.Graph) *TIDMapper {
return &TIDMapper{
Graph: g,
}
}